براغي رأس مقبس M4-0.7 × 85 مم | محرك مقبس سداسي | ملولبة جزئيًا | فئة 12.9 من سبائك الفولاذ المطلية بالزنك (100/عبوة)

The zinc plating on these is far nicer than I expected for the price, and the hex socket drive seated perfectly into my Allen key without any wobble. Used a dozen of them to hold a steel jig together and not a single one stripped under torque.

The 85mm length is exactly what I needed for a tight assembly, and the hex socket drive made installation much easier than a standard slot head. The zinc plating gives them a clean look and they thread smoothly without binding.

I needed a long M4 screw for a jig I was building, and the 85mm length with the partial threading worked perfectly to clamp two plates together. The hex socket drive made installation feel very secure.